Self and james w



J. H. osGooD, JA. APPARATUS Pon DRYING LUMBER.

C In? @mit gram @anni @frn Y APPARATUS FOB. DBYINGLUMIBER.

SELF AND JAMES W. HANNA, OF WABASH,'Il\TDLAI`LA.. Laan Pam No. 60,043, daad November 2r, 1866. 1

SPECIFICATION.

`Be it known that I, JAMES H. OSGOOD, jr., of Boston, in the county of Suiolkfand` State of .lldassachnsetts,i` have invented a new and useful improvement in the method of Drying and Seasoning Lumber, of which the'.

following is a full, clear, andexact description, reference :being had to the accompanying drawings, making a part .of this specification, in whichi Figure 1 represents a longitudinal vertical section.; and Figure 2, a transverse section on the line a: x, of Iig. 1.. y Similar letters indicate like parts in the several figures.

The object of my invention is to dry and season lumber in the shortest possible Vtime without injuring the'` i t same, and the invention consists in first subjecting the lumber to be seasoned to the action of steam at a proper temperature, and immediately afterwards to heated air. In the method heretofore practised in seasoningi'ol'v A i drying lumber, it has been usual to subject it to a high degree of dry heat, by which means itis liable to becomel vscorched or partially charred, rendering it unfit for many purposes of manufacture, owing to the peculiar quality of the sap contained in the same. By subjectingthe lumber iirst to the action of` steam, the sap becomes asit were decomposed or changed, so' as to be readily driven out or thoroughly .dried by the' subsequent actionY of a moderate degree of heat,without injiiry to the-wood.

" vReferring to the drawingm-A represents the frame of a buildingV of any required dimensions and formed in two compartments, B C, each having a door-'at its outer end, and made as nearly steam .or air"'tight as possible. The walls or sides may be of double thickness', with or without' any4 suitable filling, if requisite.V The compartments are separated by a sliding door or partition to admit of a load of lumber being passed readily"- l from one compartment to the other; two doors or slides may be used if. found desirable to prevent too freer-a communication'between the two compartments. On the floor of each compartment may he laid railroad rails, so that a. car of lumber may be run over the same into and out of the compartments. D represents aeteani boiler, y. communicating with which is ,a pipe, d, (one or more,) by which steam is conducted to 4the apartment, B, from y whence it escapes through a pipe, e, leading from the compartment, yB, and passing in a coiled or windingform under the compartment, C, so as to impart its heat to the same, and thence 'out' in any proper manner from the building. The products of combustion pass from the furnace through a winding pipe, f, at the side 'of the com# partment, C, so as to radiate as much heat as possible into the said compartment, representing thesteam chamber, and C the hot-air chamber. Additional heating apparatus may he added tothe-chamber, C, if foundv necessary. The operation is as follows: A car loaded with lumber Vis run `into the chamber, B, when the doors are closed and steam is let into the chamber. After being subjected to the action of'the steam as long as may vbe thought necessary, the steam is shut oif and the door or slide, E, is opened, when the car ismoved Toward i into chamber C, where the lumber is subjected to dry heat as long' as may be necessary. Another loaded car may at the same time he introduced into chamber B, so that the operations of steaming and drying-may bc-rcon tinuous, and the lumber is thus rapidly dried and seasoned. l Having thus described my invention, what I claim as new, and desire tosecure by LettersPatent, is

The combination of a steam-heating chamber with a hot-air chamber, substantially as and'fo'rthe purpose set forth. r

In testimony whereof I have sign ed my name to this sp eciication in the presence of two subscribing witnesses.

JAMES u. oscoon, Je.

i Witnesses:

J. H. Ansus, G. A. C. SMITH. 

